Permanent magnet four-pole three-phase synchronous generator rotor

Abstract

The invention discloses a permanent magnet four-pole three-phase synchronous generator rotor, which comprises a rotor core, first permanent magnets, second permanent magnets, a gland and a rotor shaft, and is characterized in that magnetic poles are respectively arranged in four directions of the rotor core, and the four magnetic poles are uniformly distributed around the axis of the rotor core; amagnet groove is reserved in each magnetic pole, and the cross section of each magnet groove is in the shape like a Chinese character 'er'; each magnet groove comprises a first permanent magnet groove and a second permanent magnet groove, the first permanent magnet groove and the second permanent magnet groove are arranged in parallel, and the width of the first permanent magnet groove located onthe outer side is less than that of the second permanent magnet groove located on the inner side; and the first permanent magnets are respectively located in the first permanent magnet grooves, and the second permanent magnets are respectively located in the second permanent magnet grooves. According to the invention, a strip-shaped small-size permanent magnet arrangement mode in the shape like aChinese character 'er' is adopted, and a high magnetic pole intermediate magnetic flux density can be obtained without arranging an integral permanent magnet with large volume, so that the rare earthmaterial can be saved, the cost is lower, and the wide-range popularization and application are facilitated.

Description

technical field [0001] The invention relates to the technical field of permanent magnet generators, in particular to a permanent magnet four-pole three-phase synchronous generator rotor. Background technique [0002] A permanent magnet generator refers to a power generation device that converts mechanical energy converted from thermal energy into electrical energy. It was first successfully developed by France. [0003] In today's DC motors, the excitation method that uses DC current to generate the main pole magnetic field is called current excitation; if permanent magnets are used instead of current excitation to generate the main pole magnetic field, this type of motor is called a permanent magnet motor. [0004] The permanent magnet generator has the advantages of small size, low loss and high efficiency. Today, energy conservation and environmental protection are increasingly valued, so it is very necessary to study it. With the continuous improvement and improvement ...

AI Technical Summary

Problems solved by technology

[0008] However, due to the high cost of rare earth materials, unreasonable design wastes rare earth materials and increases the cost of permanent magnet generators.

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